Waste Spark Ignition, etc

[John W. Beggs]

> Why is everyone so excited over waste-spark ignitions ("dual ended coils")?

Waste spark (spark on the exhaust stroke which requires very little voltage 
to fire the plug) is a cost-effective alternative to an independent setup 
and it provides far better performance than the conventional mechanically 
driven distributor ignition.

On an independent ignition system, the ECM determines the correct ignition 
timing based on cam and crank sensor inputs.  It is possible to fine tune 
each cylinder to maximize power or emissions or economy.  Just imagine what 
a NASCAR Winston Cup stock car could achieve with this system.  





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                       |   John W. Beggs,                   |
                       |   BC Hydro,                        |
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